标题: 超薄可挠曲液晶显示器之研究
Ultra slim and flexible liquid crystal displays
作者: 陈俊瑜
Chen, Chun-Yu
郑协昌
Jeng Shie-Chang
光电科技学程
关键字: 软性显示器;偏光板;高分子墙;奈米粒子POSS;flexible displays;polarizer;polymer wall;POSS nanoparticle
公开日期: 2011
摘要: 本研究中我们使用一般液晶显示器的架构,以一般液晶显示器所需要的上、下软性材质的偏光板(Polarizer) 当作液晶显示器的基板,以达到可挠曲及厚度超薄的特性。因为偏光板本身不耐高温,在制作过程中容易因温度造成偏光板的卷曲,所以传统液晶显示器需要高温制程的氧化铟锡(Indium Tin Oxide, ITO)导电层及聚醯亚胺(Polyimide, PI)配向制程,就无法应用在以偏光板做为基板的液晶显示器上,故针对材料及制程的选用上我们就必需优先考虑温度对偏光板的影响。
本论文使用多面体矽氧烷奈米粒子(Polyhedral Oligomeric Silsesquioxanes, POSS)掺杂在液晶,因POSS吸附在基板上,将可诱导原本不具有配向膜的液晶盒产生垂直配向能力,因此避开聚醯亚胺配向层的高温制程;此外,我们亦用导电高分子(poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate), PEDOT:PSS)混合奈米碳管涂布于偏光板上当作导电层,用以取代溅镀ITO的制程。为避免软性显示器挠曲造成显示器间隙(cell gap)不均或者发生上下基板短路而影响光电特性,本研究以高分子单体混入液晶,再加以曝光相分离方式来形成高分子墙(Polymer wall),用以支撑上下基板并维持液晶盒的间隙及光电特性。
ABSTRACT
The polarizers have been applied as the substrates for fabricating an ulta slim and bendable liquid crystal displays (LCDs) in this work. The polarizer can only stand for ~ 70 ℃ manufacture temperature. Therefore, the high temperature processes for the conventional LCDs, such as sputtering indium tin oxide (ITO) and baking polyimide (PI) alignment layers, are not suitable for plastic LCDs.
In this research, the polarizer is coated with the mixture of poly-3,4-ethylenedioxythiophene:poly-styrenesulfonate (PEDOT:PSS) and carbon nanotube (CNT) to replace ITO as the conducting layer. The addition of polyhedral oligomeric silsesquioxanes (POSS) nanoparticle into the LC layer is used to align LC vertically, and the polymer walls fabricated by photo-induced phase separation are also applied for maintaining the cell gap under bending conditions in this work.
URI: http://140.113.39.130/cdrfb3/record/nctu/#GT079980513
http://hdl.handle.net/11536/50974
显示于类别:Thesis